Problem to show/hide image in crystal report 2012

        DataTable dt = new DataTable(); 
        // Create the data row according to your requirement     
        if (Handle your logic)) { 
            fs = new FileStream("RealImage.Jpg", FileMode.Open); 
        } 
        else { 
            fs = new FileStream("Blank.jpg", FileMode.Open); 
        } 
        // Read the image add it in to the data table
        CrystalReport1 MyCrystalReport1 = new CrystalReport1(); 
        MyCrystalReport1.SetDataSource(dt); 
        CrystalReportViewer1.ReportSource = MyCrystalReport1;